Drawing-table.



H. S. KUHN.

DRAWING TABLE.

APPLICATION FILED MAR. l2. I915.

Patented Feb. 15, 1916.

2 SHEETS-SHEET 2.

I11. IIIIIIII/I/l/ Inventor Witnesses Attorneys THE COLUMBIA PLANOGRAPHco., WASHINGTON, D. c.

HARRY S. KUHN, OF WAYNESBORO, PENNSYLVANIA,

DRAWING-TABLE.

Specification of Letters Patent.

Patented Feb. 15,1916.

Application filed March 12, 1915. Serial No. 13,946.

To all whom it may concern:

Be it known that I, HARRY S. KUHN, a citizen of the United States,residing at \Vaynesboro, in the county of Franklin and State ofPennsylvania, have invented a new and useful Drawing-Table, of which thefollowving is a specification.

The present invention appertains to a drawing table, and aims to providea novel and improved device of that character.

Among its various objects, the invention aims to provide a drawing tablehaving a thawing or drafting board which may be revolved to variouspositions in order that the light may strike the board at the desiredangle; to provide a drawing table embodying a vertically adjustableboard, whereby the same may be adjusted to various heights; to providenovel means whereby the board may be swung to various angles from ahorizontal to a vertical position: to provide novel means for raisingand lowering the board; to provide novel means whereby the board may beslid or adjusted at any position to which it is swung and will becounter balanced to hold its position; to provide a slide leaf anddrawer which are at apted to be drawn from below the board; and toprovide other desirable features in a table used for drawing or similarpurposes.

Nith the foregoing and other objects in view which will appear as thedescription proceeds, the invent on resides in the combination andarrangement of parts and in the details of coi'istruction hereinafterdescribed and claimed. it being understood that changes in the preciseembodiment of the invention herein disclosed can be made within thescope of what is claimed without departing from the spirit of theinvention.

The invention is illustrated in the accompanying drawings, wherein-Figure 1 is a plan view of the improved table, the board being removed,and a portion of the frame being broken away. Fig. 2 is a sectional viewtaken on the line 2-2 of Fig. il. Fig. 3 is a sectional detailillustrating one of the carriages for the weight. Fig. t is a verticalsection of the table taken on the line l-l of Fig. 1. Fig. 5 is a crosssectional view of the standard taken on the line 5-5 of Fig. i.

The present table embodies a central adjustable or extensible standard 1comprising a lower tubular or hollow section 2 having a base 3 adaptedto be fastened or secured upon the floor or other support, and an uppersection i, in the form of a screw telescoped into the section 2. A nut 5is threaded upon the section or screw 4: and seats upon the upper end ofthe section 2 for supporting the screw 4 at various vertical. positions,it being noted that the nut may be rotated to either raise or lower thescrew and parts carried thereby. The nut 5 is preferably provided with ahand wheel 6 in order that it may be readily turned. The section 2 isprovided with a pair of contracted bearing portions 7 with which thescrew 4 is slidably engaged, and the standard section '2 is providedbetween the portions 7 with means for locking the screw 4 in position.Thus, the section 2 is provided between the portions 7 with anoutstanding boss 8. and a set screw 9 is threaded into the boss 8. Ahard Wear block 10 is disposed slidably within the inner or basal endportion of the boss 8 and is provided with a curved or concaved face tobear against the side of the screw 41, the inner end of the set screw 9bearing against the block 10 to force the same inwardly. lVhen the setscrew 9 loosened, the block 10 will be released. and the screw 4 maythen be adjusted by rotating the nut 5.

The upper end of the standard 1 carries the frame for the drawing board,and to this end. a casting or head 11 is secured upon the upper end ofthe screw of the standard. and has secured thereon a transverse channeliron member 12. A pair of angle iron members or T-heads 13 are securedupon the ends of the member 12, and receive and hold the side bars 14 ofthe frame. The frame also includes bars or arms 15 having their forwardends connected by means of hinges 16 to the forward ends of the bars 14,and whereby the arms 15 may swing upwardly and downwardly above the bars14. I

The arms 15 carry the drawing board 17. which is provided at its undersurface with a pair of cleats 18 which fit against the inner sides ofthe arms 15 for constraining the board 17 against transverse motion uponthe arms 15, but to enable the board 17 to be shifted back and forthupon the arms. The lower or forward edge of the board 17 is preferablyprovided with a pencil holder or trough 19.

The board 17 is provided wit 1 a counter balance, and to this end atransverse rod 20 is terminally engaged to the upper or free ends of thearms 15, and nuts 20 are preferably threaded upon the rod 20 to clampthe arms 15. and whereby the. rod 20 will brace the arms. The rod 20serves as a support for a pair of pulley wheels 21 which are jcurnaledloosely upcn the rod to rotate and slide thereon, and a pair of cablesor flexible elements are secured to the bottom of the board 17 and passaround the pulley wncels 21 to a weight which acts as a counter poisefor the board. The ends of the transversely arranged weight 23 areengaged to a pair of carriages 24 each of which has a pair of groovedwheels 25 engaging and straddling the inwardly projecting flange of anangle iron rail or guide 26 secured to the inner side of the adjacentarm 15. In this manner, the weight 23 is carried by and guided along thearms 15, and holds the board 17 at any position to which it is slid..lttention is directed to the fact that when the arms 15 are swungupwardly, whereby the board 17 has a greater tendency to slidedownwardly, the effect of the weight to raise the board will beincreased, so as to cause the board and weight to counter balance oneanother properly, whereas when the arms 15 are swung downwardly, therewill be less liability for the board 17 to slide forwardly ordownwardly, and at the same time, the raising effect of the weighttransmitted by the cords to the board will be educed. The board andweight therefore counter balance one another at any position of the arms15.

The device for adjusting and holding the arms 15 embodies a pair offront and rear transverse rods 27 and 28 terminally en-- gaged throughthe front and rear end portions of the bars 14, and having therespective nuts 27 and 28 threaded thereon to clamp the bars. The rods28 thus brace and tie the bars 14 together. Front and rear bearings 25)and 30, respectively, are secured or mounted upon the central portionsof the rods 27 and 28, and a screw 31 is terminally journaled within thebearings 29 and 30, and is provided at its forward end with a knurledfinger piece 32 whereby the screw may be conveniently rotated by theoperator at the front of the table. A pair of adjusting and supportingmembers or bars 33 are pivoted to the outer sides of the arms 15 at theproper points, and their lower or free portions are provided with forks3t. and a transverse rod 33 is terminally engaged through the arms ofthe forks 34. Flanged wheels or rollers 36 are journaled upon the rod 35within the forks 31 and run upon the upper edges of the bars 14, itbeing noted that the rod 35 causes the members 33 to swing in unison,and that the wheels 36 in working upon the bars 14 will properly guidethe members A bow-shaped spring 37 is terminally secured to the rod 33at points adjacent the forks 34, and the central portion of the spring37 is secured to or provided with a nut 33 threaded upon the screw 31 infront of the rod Thus, when the screw 31 is rotated, the nut 38 will befed forwardly or rearwardly, according to the direction in which thescrew is turned, and the rod 35 will be moved with the nut 38. The rod35 being moved forwardly or rearwardly will raise or lower th 1 arms1-") and board 17 carried thereby. When the screw 31 is rotated to movethe nut 38, the spring 37 yieldahly moves the rod 35, the yielding actin of the spring being desir able for yieldably raising or lowering theboard. Furthermore, the spring allows the board to yield when sufficientpressure given to bear thereon, this yielding morement of the boardbeing desirable in many cases. The bars 33 form props between the arms13 and the bars 11, whereby the downward pressure exerted is transmittedto the bars or props 33, and said props resting upon the frame willresist the downward movement of the board, although the bars can slidealong the frame against the tension of the spring 37 when necessary.This al lows the board to be depressed, but not too easy. The bars 11also carry a slide leaf 39 which has its side edges slidably received bylongitudinal grooves 40 provided in the inner sides of the bars 14, andwhereby the leaf 39 may be pulled forwardly from below the lower edge ofthe board 17. The leaf 39 carries a slidable drawer 41 below the same,which may be used for holding he drawing instruments, scales, and otherarticles desired. The front end of the drawer 11 is provided with ahandle and a key controlled lock 43.

The present drawing table has many advantages which will be appreciatedby the artist, draftsman, architect or other person using such a table.For instance, the upper frame of the table may be readily rotated tobring the board 17 to the most effective position for receiving thelight thereon, and the board 17 may be readily adjusted vertically byadjusting the standard 1. The angle of the board 17 can also be readilyadjusted, by rotating the screw 31, so that the rod 38 will be carriedin the proper direction for either raising or lowering the board. henthe nut 31 is drawn forwardly. the members 33 being pushed forwardly,will swing the arms 13 and board 17 toward a vertical position, and whenthe nut 31 is moved rearwardly, it will move the lower or free ends ofthe members 33 rearwardly to lower the arms 15 and board 17.Consequently, by adjusting the raising and lowering device, the boardmay be brought to any angle, may be lowered to a horizontal position, ormay be raised to a vertical position. The spring 3? connecting the nut38 and rod 35 will allow the said parts to yield relatively to oneanother, whereby the board and its supporting arms will be yieldablymoved and supported. IVhen the nut 38 is moved rearwardly to its limit,the arms 15 are adapted to seat upon the bars 14, and when it is desiredto hold the arms 15 stationary relative to the bars 14:, this may beaccomplished by the use of other ordinary brackets (not shown) appliedto the rear ends of the arms 15 and bars 11. Attention is also directedto the fact that the board 17 may be slid back and forth at any angle orposition thereof, and the frictional engagement between the board 17 andarms 15 will be sufficient under ordinary conditions, to prevent theboard 17 being displaced by slight upward or downward pressures given tobear thereon, during the use of the table. The leaf 39 may be pulled outfrom under the board 17, and is useful, since calculations, sketches,and the like may be made thereon, and paper, pencils, and other articlesmay be laid upon the leaf 39 while the board 17 is at an inclinedposition. The drawer 411 is also useful in that the instruments, scales,and other devices may be contained therein, and kept locked within thedrawer, when not in use. The bars 14 may also be detached or lifted fromthe angle iron members 13 so that they may be set upon a table, bench orother support when desired.

The carriages 24 are not limited to the specific constructionillustrated, and are to he considered broadly only.

Having thus described the invention, what is claimed as new is:

1. In a device of the character described, a frame having a pair ofhinged arms adapted to be swung upwardly and downwardly, a boardslidable upwardly and downwardly upon the arms, a rod carried by thearms, inwardly projecting flanges Copies of this patent may carried bythe arms, carriages having pairs of grooved wheels engaging the flanges,a weight carried by the carriages, a pulley wheel journaled upon therod, and a flexible element attached to the board and weight and passingover the pulley wheel.

In a device of the character described, a frame comprising lower andupper members hinged together, the upper member being adapted to swingupwardly and downwardly, a board carried by the upper member, a swingingmember pivoted to one of the aforesaid members and having its freeportion bearing against the other member, a rotatable screw carried bythe last mentioned member against which the swinging member bears, a nutthreaded upon the screw, and a yieldable connection between the nut andswinging member.

3. In a device of the character described, comprising a frame embodyinga pair of bars and a pair of arms hinged thereon to swing upwardly anddownwardly thereabove, a pair of members pivoted to the arms, a rodengaged to the free portions of the said members, wheels journaled uponthe rod and running upon the bars, a rotatable screw carried by thebars, a nut threaded upon the screw, and a bow spring terminally securedto the rod and having its central portion secured to the nut.

4;. In a device of the character described comprising a standard, atransverse member carried by the standard, a frame embodying side bars,angle iron T-heads carried by the ends of the said member in which thesaid side bars are seated, and a board carried by the frame.

In testimony that I claim the foregoing as my own, I have hereto afiiXedmy signature in the presence of two witnesses.

HARRY S. KUHN.

Witnesses:

M. G. HARMONY, IV. OTTO Coowrns.

be obtained for five cents each, by addressing the Commissioner ofPatents,

Washington, D. C.

